Cylinder drying-machine.



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(Akt/L fm Mmu PATENTED APR. 7, 1908. J. A. MERRBTT. CYLINDER DRYING MACHINE. APPLICATION HLED'JAM z5, 1904.

Wzlizees.' @WIM No. 883,729. PATENTED APR. 7, 1908. J. A. MBRRETT.

CYLINDER DRYING MACHINE.

APPLICATION FILED JAN, 25,1904.

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Wl'zfze-Sse s: Invertia/1' Marwan..

- wgwmhkttarmq UNITED sTATEs PATENT oEEioE.

JOHNl A. MERRETT, OF LONDON, ENGLAND, ASSIGNOR TO JAMES ROBINSONHATMAKER,

,OF PARIS, FRANCE. l

CYLINDER DRYING-MACHIN E.

massages.`

specificati@ of Letters Patent.

Patented Aprii 7, 190e.

.ippiitttioniiiea Januarya, 1904. semi No. 223,637.

To all whom it may concern:

Be it known that I, JOHN ALFRED MER- EETT, a citizen of Great Britain, residing at Bowes Park, London, En land, have invented a certain new and use ul Improvement in Cylinder Drying-Machines, of vwhich thefollowing is a specification;

My invention has4 articular reference t0 machines composed o one or more revoluble heated cylinders upon which liquid materials are distributed in a layer or film for the purpose of evaporating their contained water and it consists in improved means for removing such layers. or films of materials from such cylinders as they revolve.

`I have found that'the known doctor or stri ping knives employed on paperemaking an(v similar machines are not efficacious for satisfactorily removing from revolving cylinders very thin layers" or filmsl of materials` that are easil injured by'over-heating (such as milk) an which consequently must be quickly and entirely removed when eX osed upon cylinders that are highly heate My improvements consist in new constructions or arran ements of means forA readily adjusting and olding at any desired angle a moreror ess elastic knife, throughout its entire length, in such' close contact with'- a smooth revolving c linder that materials eX- posed upon such cy inder/are not able to pass under such knife but are completely removed thereby.

.In asuitable position parallel with the lace vof the smooth drying cylinder of a machine of the class in question, I arrange a strong backlate to serve as a support or the stripping e. This back-plate is pivotedat either end of the machine so as to have a limited f amount of angular motion towards and from the cylinder. The pivots lare carried, in

bearings which can be raised or loweredfor the lpurpose of thereby altering the distance between the centers about which the backplate rocks and the centers'about which the cylinder revolves. The strip ing knife is attached to this back-plate by -means of screws or otherwise in an convenient man# sition a strong bar is mounted parallel with the back-plate in the frame of the machine and an adjustable connection is made bev.tween this bar with a solid arm or web projecting from the back-plate by means of i screw-bolts. To bring and keep the knife edge can be ke t in close contact with the cylinder at all points.

InA order that my invention may be more easily understood I'will describe a drying machine fitted therewith, by the aid of-the accompanying drawings in which Figure I shows an end view artly in section) of a twin-cylinder drier; ig. II a side view;4 Fig. III a section 'of the knife, back- 1ders may be regulated. Steam for heating the cylinders is introduced at the opening D,

'and the condensed water is taken out at the o posite end of the cylinders by` the pipe `E, wlhich is connected with a lifting arrangement or Siphon indicated by E. .he liquid materials or solutions tobe dried, introduced between the cylinders (as by a ipe F)` are prevented from running out at t ie ends by suitable sto s G G placed at the ends of the cylinders. he cylinders being slightly separated in operation the material to be dried passes bet-Ween them and is carried upon each cylinder in a thin layer orl film until it reaches the stripping knife H.

My constructions or improved means for fixing and holding the knife at any desired angle 'and for keeping the stripping edge throughout its entire length in close contact with the cylinder are'shown in Figs. I and II in osition on the machine and in Figs. III and) IV se afately on a larger scale. The back-platell, movable on the pivots J J (carthe sharp edge of the. stripping knife, throughout its entire'length,

'la-te, etc., and Fig. IV a front viewof these ried in bearings K K capable of being raised or lowered by the screws L L) and connected with the rigid bar M by the adjustable bolts N N, carries the stripping knife H with .its cover-plate O fitted with adjustable setscrews P P. The cover-plate O and the stripping knife H are attached to the backplate by screws Q Q. By these means lthe general position of the knife with relation to the face of the cylinder can be easily adjusted and maintained and the stripping edge of the knife can be ke t at all points in close contact with the cylindbr so as to allow no material to lpass under it.

- lthough my improvements are es ecially desirable in connection With cylin er machines employed for drying materials easily injured by heat it is to be understood that v they may be used on cylinder machines emloyed for other'purposes such as for cooling ard, etc.

-What I claim is:

1. In a stripping device for cylinder machines, means or holding in Working position the strip ing-knife carried by a pivoted backlate, t e said means consisting of a bar fixed parallel with the back-plate and above its axis and adjustable bolts connecting the u per arm of the said backeplate with the said ar, substantially as described.

2. In a stripping device for cylinder machines, an adjustablevback-plate fitted with an elastic strip ing-knife and with a coverplate for the said knife furnished at short intervals with yadjustable set-screws bearing upon the outer edge of the knife near its stripping edge to brin the said edge of the stripping-knife, throug out its entire length, in close contact With the cylinder, substantially as described.

3. A stripping device for cylinder drying machines, the said device consisting of a combination of an adjustable back-plate pivoted in end bearings and fitted at its lower edge with an elastic strippin knife and With a cover plate for the said knlfe furnished at short intervals With adjustable set-screws bearing upon the outer surface of the knife near itsstripping ed e to bring the said edge of the stri ping-kni e throughout its entire length in c ose contact With the cylinder, and of a rigid bar fixed parallel With the backplate and above its axis, and of adjustable olts connecting the u er arm of the said back-'plate with the sait ar-to hold the knife carried by theback-plate in working position, substantially as described. f

-JoHN A. MERRETT.

ln presence ofl JAMES R. HATMAKER, F. P. HATHAWAY. 

